The House Select Committee on Assassinations put together a "mugbook" containing photographs of a variety of persons of interest to that investigation. Scanned from the collection at the National Archives, these photos are now available online here.
Persons depicted range from Lee Oswald and his wife Marina to suspected Odio visitors Loran Hall and William Seymour, figures from the Garrison investigation including Gordon Novel and Jack Martin, soldier of fortune Gerry Patrick Hemming and several unidentified men from No Name Key, Jack Ruby, Roscoe White, and many more. A few of the photos are missing from the Archives' collection.
An index to the photo mugbook is available in document 180-10124-10172.